Have you hand pollinated theHave you hand pollinated the flowers? In a greenhouse, you likely will not have enough pollinators, so you need to do hand pollination to get fruit. The larger female flowers will have a slight bulge at the base (perhaps the pea fruit that you see?), even though they are not pollinated. They will not grow further, however, until pollinated. In the morning (best time), take a small male flower and rub its pollen (on the anther) onto the stigma of the larger female flower (the top of the central structure in the female flower). You can use a small paintbrush for this, or just gently rub the two flowers directly. Do this for all female flowers (using several male flowers).